Fix test class links, per sbesson's suggestion.
Ressurect the ArrayColumn documentation

This reverts commit 48f3a5c3bb4b1b25e1306c93a50b30a68388c39b.
Added doc for FloatArrayColumn
Add clarification that Float/Double/Long are 32/64/64 bits
Remove long from values type since it applies to multiple column types
Addd versionchanged directive
merge dev_4_4 -D org -I include -E exclude: PR 245 (Add note about Java UTF-8 source in Insight.)
merge dev_4_4 -D org -I include -E exclude: PR 274 (Add information about default include/exclude filters for scc merge)
merge dev_4_4 -D org -I include -E exclude: PR 277 (Make small fixes on developers' testing page.)
merge dev_4_4 -D org -I include -E exclude: PR 279 (Tables ArrayColumn docs 9957)